Method of dividing a workpiece in the form of a plate having...

Details Method of dividing a workpiece in the form of a plate having... Method of dividing a workpiece in the form of a plate having...

2006-08-08

2006-08-08

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

By arc

C438S463000

Reexamination Certificate

active

07087857

ABSTRACT:
A method of dividing a plate-like workpiece having a layer that is made of a different material from that of a substrate and is formed on the front surface of the substrate along predetermined dividing lines, comprising a laser beam application step for applying a laser beam to each dividing line formed on the plate-like workpiece except for a non-processed area in at least one end portion thereof to form grooves deeper than the layer; and a cutting step for cutting the plate-like workpiece along each dividing line by positioning a cutting blade on the side of the non-processed area in the dividing line where the grooves have been formed in the laser beam application step and moving the plate-like workpiece relative to the cutting blade while rotating the cutting blade.

REFERENCES:
patent: 6300224 (2001-10-01), Arima et al.
patent: 2002/0048906 (2002-04-01), Sakai et al.
patent: 2005/0035100 (2005-02-01), Genda
patent: 3-64043 (1991-03-01), None
patent: 2003-320466 (2003-11-01), None

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